Which of the following is a possible measurement of velocity? a. 25 m b. 25 m/s c. 25 m east d. 25 m/s east

Answer is B.
Because velocity is vector quantity, so magnitud and direction are needed to define it.
Since velocity means the speed(magnitude) of some object in a given direction, so it’s units are usually measured by meters/ seconds

What kind of enegia produces the mixture of bicarbonate and vinegar  chemical producetion